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CHAMPIONSHIP ENGINE COMPONENTS<br />
MADE IN THE USA<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
QUICK INFO >>><br />
Serious street performance, mild bracket racing and<br />
oval track. Maximum torque and throttle response from<br />
3,500 to 7,800 RPM. Best for 363-427 cubic inch engines.<br />
Works with most standard components.<br />
Every intake port, exhaust runner, valve bowl,<br />
and every combustion chamber is 100% CNC<br />
machined on special dedicated PRO1 castings.<br />
These heads are ideal for high compression,<br />
big cubic inch small blocks and are great for<br />
supercharged applications.<br />
Exhaust runners are raised .135” for improved<br />
flow. Manganese Bronze valve guides are used<br />
for long life, and hardened valve seats provide<br />
durability with unleaded fuels. Features 3.000"<br />
exhaust bolt pattern.<br />
Assemblies include Stainless Steel valves,<br />
premium springs, locks, retainers, studs, guide<br />
plates and seals.<br />
Heads are sold individually.<br />
20°<br />
225cc<br />
CNC<br />
PRO1 20° 225cc CNC - ALUMINUM<br />
62cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
13072040 Bare Head<br />
13072142 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
13072143 1.550” Dual Springs for Solid Roller Cam .700”<br />
SMALL BLOCK FORD<br />
CAST ALUMINUM CYLINDER HEADS<br />
Head parts kit - see page 118.<br />
Uses 7/16” screw-in rocker studs.<br />
Assemblies with 1.550” valve spring<br />
use +.100” long valves.<br />
PRO1 20° 225cc CNC SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Valve Angle:<br />
20° (stock)<br />
Intake Port Volume: 225cc CNC<br />
Intake Valve: 2.080”<br />
Exhaust Valve: 1.600”<br />
Chamber Volume: 62cc<br />
FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 136 115<br />
.300” 201 164<br />
.400” 259 205<br />
.500” 300 225<br />
.600” 323 231<br />
.700” 325 238<br />
Not intended for sale or use with pollution controlled vehicles.<br />
110<br />
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